diff --git a/src/main/java/com/iexec/commons/poco/chain/ChainUtils.java b/src/main/java/com/iexec/commons/poco/chain/ChainUtils.java
index 0f2cbd0..c97e188 100644
--- a/src/main/java/com/iexec/commons/poco/chain/ChainUtils.java
+++ b/src/main/java/com/iexec/commons/poco/chain/ChainUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2023 IEXEC BLOCKCHAIN TECH
+ * Copyright 2020-2025 IEXEC BLOCKCHAIN TECH
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,8 @@
 
 package com.iexec.commons.poco.chain;
 
-import com.iexec.commons.poco.utils.BytesUtils;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.bouncycastle.util.Arrays;
 import org.web3j.crypto.Hash;
@@ -28,14 +29,11 @@
 import java.math.BigInteger;
 
 @Slf4j
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class ChainUtils {
 
-    private ChainUtils() {
-        throw new UnsupportedOperationException();
-    }
-
     public static String generateChainTaskId(String dealId, int taskIndex) {
-        byte[] dealIdBytes32 = BytesUtils.stringToBytes(dealId);
+        byte[] dealIdBytes32 = Numeric.hexStringToByteArray(dealId);
         if (dealIdBytes32.length != 32) {
             return null;
         }
@@ -46,7 +44,7 @@ public static String generateChainTaskId(String dealId, int taskIndex) {
         }
         //concatenate bytes with same size only
         byte[] concatenate = Arrays.concatenate(dealIdBytes32, taskIndexBytes32);
-        return Hash.sha3(BytesUtils.bytesToString(concatenate));
+        return Numeric.toHexString(Hash.sha3(concatenate));
     }
 
 
diff --git a/src/main/java/com/iexec/commons/poco/chain/IexecHubAbstractService.java b/src/main/java/com/iexec/commons/poco/chain/IexecHubAbstractService.java
index 2c1bda6..e5a5a95 100644
--- a/src/main/java/com/iexec/commons/poco/chain/IexecHubAbstractService.java
+++ b/src/main/java/com/iexec/commons/poco/chain/IexecHubAbstractService.java
@@ -503,7 +503,7 @@ Optional<TaskDescription> repeatGetTaskDescriptionFromChain(final String chainTa
                         String.format("getChainApp() [address:%s]", chainDeal.getDappPointer()))
                 .orElse(null);
 
-        final ChainDataset chainDataset = new Retryer<Optional<ChainDataset>>()
+        final ChainDataset chainDataset = !chainDeal.containsDataset() ? null : new Retryer<Optional<ChainDataset>>()
                 .repeatCall(() -> getChainDataset(chainDeal.getDataPointer()),
                         Optional::isEmpty,
                         retryDelay, maxRetry,
diff --git a/src/main/java/com/iexec/commons/poco/chain/SignerService.java b/src/main/java/com/iexec/commons/poco/chain/SignerService.java
index c9ea1c8..f7575c7 100644
--- a/src/main/java/com/iexec/commons/poco/chain/SignerService.java
+++ b/src/main/java/com/iexec/commons/poco/chain/SignerService.java
@@ -204,7 +204,7 @@ public String sendCall(String to, String data, DefaultBlockParameter defaultBloc
         if (ethCall.hasError()) {
             decodeAndThrowEvmRpcError(ethCall.getError(), "ethCall");
         }
-        log.debug("ethCall [value:{}]", ethCall.getValue());
+        log.trace("ethCall [value:{}]", ethCall.getValue());
         return ethCall.getValue();
     }
 
diff --git a/src/main/java/com/iexec/commons/poco/chain/Web3jAbstractService.java b/src/main/java/com/iexec/commons/poco/chain/Web3jAbstractService.java
index 62df0b9..f52ae19 100644
--- a/src/main/java/com/iexec/commons/poco/chain/Web3jAbstractService.java
+++ b/src/main/java/com/iexec/commons/poco/chain/Web3jAbstractService.java
@@ -226,7 +226,7 @@ public String sendCall(final String from, final String to, final String data, fi
         if (ethCall.hasError()) {
             decodeAndThrowEvmRpcError(ethCall.getError());
         }
-        log.debug("ethCall [value:{}]", ethCall.getValue());
+        log.trace("ethCall [value:{}]", ethCall.getValue());
         return ethCall.getValue();
     }
 
diff --git a/src/main/java/com/iexec/commons/poco/utils/HashUtils.java b/src/main/java/com/iexec/commons/poco/utils/HashUtils.java
index 994df1b..36b1bc5 100644
--- a/src/main/java/com/iexec/commons/poco/utils/HashUtils.java
+++ b/src/main/java/com/iexec/commons/poco/utils/HashUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2023 IEXEC BLOCKCHAIN TECH
+ * Copyright 2020-2025 IEXEC BLOCKCHAIN TECH
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,32 +16,31 @@
 
 package com.iexec.commons.poco.utils;
 
- 
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import org.bouncycastle.util.Arrays;
 import org.web3j.crypto.Hash;
 import org.web3j.utils.Numeric;
 
 import java.nio.charset.StandardCharsets;
 import java.util.Objects;
 
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class HashUtils {
 
-    private HashUtils() {
-        throw new UnsupportedOperationException();
-    }
-
     public static String concatenateAndHash(String... hexaString) {
         // convert
         byte[] res = new byte[0];
         for (String str : hexaString) {
-            res = org.bouncycastle.util.Arrays.concatenate(res, BytesUtils.stringToBytes(str));
+            res = Arrays.concatenate(res, Numeric.hexStringToByteArray(str));
         }
         // Hash the result and convert to String
         return Numeric.toHexString(Hash.sha3(res));
     }
- 
+
     /**
      * Generates SHA-256 digest for the given UTF-8 string.
-     * 
+     *
      * @param utf8String
      * @return SHA-256 digest in hex string format,
      * e.g: 0x66daf4e6810d83d4859846a5df1afabf88c9fda135bc732ea977f25348d98ede
@@ -54,7 +53,7 @@ public static String sha256(String utf8String) {
 
     /**
      * Generates SHA-256 digest for the given byte array.
-     * 
+     *
      * @param bytes
      * @return SHA-256 digest in hex string format,
      * e.g: 0x66daf4e6810d83d4859846a5df1afabf88c9fda135bc732ea977f25348d98ede
@@ -63,5 +62,5 @@ public static String sha256(byte[] bytes) {
         byte[] hexBytes = Hash.sha256(bytes);
         return Numeric.toHexString(hexBytes);
     }
- 
+
 }
diff --git a/src/test/java/com/iexec/commons/poco/chain/IexecHubAbstractServiceTest.java b/src/test/java/com/iexec/commons/poco/chain/IexecHubAbstractServiceTest.java
index 6f75d63..38bd825 100644
--- a/src/test/java/com/iexec/commons/poco/chain/IexecHubAbstractServiceTest.java
+++ b/src/test/java/com/iexec/commons/poco/chain/IexecHubAbstractServiceTest.java
@@ -297,7 +297,7 @@ private ChainDeal getMockDeal() {
                 .chainApp(ChainApp.builder().multiaddr("").build())
                 .chainCategory(ChainCategory.builder().build())
                 .dappPointer("0x1")
-                .dataPointer(BytesUtils.EMPTY_ADDRESS)
+                .dataPointer("0x2")
                 .category(BigInteger.ZERO)
                 .params(DealParams.builder().build())
                 .startTime(BigInteger.TEN)